Buzz Audio req-2.2resonance equaliser - Manual (Page 8)

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standard version. The mastering version has a different set of frequencies
optimized for stereo program equalisation. See the graphs at the end of
this manual for more detail.
SYSTEM
SYSTEM SYSTEM SYSTEM – these switches are used to completely bypass the REQ. When not
illuminated, the REQ input XLR connectors are directly connected to the
output XLR connectors providing a hard wire bypass. Note that the REQ still
does receive signal at it’s input when bypassed.
SATURATION
SATURATION SATURATION SATURATION – this 6 position switch selects the type of saturation applied to
signal. The associated ON
ON ON ON switches engages the saturation circuit when
illuminated. The saturation control changes the low frequency response of
the REQ as well as introducing low frequency harmonics generated by the
steel audio transformer. See the graph at the end of the manual for detail
on the frequency response changes for each switch position. The
harmonic distortion generated by the saturation circuit is given in the
specifications section.
6 6 6 6] Specifications ] Specifications ] Specifications ] Specifications
Frequency Response
Frequency Response Frequency Response Frequency Response
Measured with all eq bands ON set flat, Saturation and HPF OFF ........5Hz to 125kHz +0.2/-3dB
See graphs for typical eq and HPF frequency response measurements.
Harmonic Distortion
Harmonic Distortion Harmonic Distortion Harmonic Distortion
At +10dBu, Saturation OFF .......100Hz 0.007%...1kHz 0.004%...10kHz 0.007%...100kHz 0.013%
Saturation ON POS-1 ........................................20Hz 1.5%...100Hz 0.07%...1kHz and up 0.01%
Saturation ON POS-2 ........................................20Hz 1.5%...100Hz 0.14%...1kHz and up 0.01%
Saturation ON POS-3 ........................................20Hz 1.5%...100Hz 0.16%...1kHz and up 0.01%
Saturation ON POS-4 ........................................20Hz 1.6%...100Hz 0.17%...1kHz and up 0.01%
Saturation ON POS-5 ........................................20Hz 1.7%...100Hz 0.18%...1kHz and up 0.01%
Saturation ON POS-6 ........................................20Hz 2.0%...100Hz 0.22%...1kHz and up 0.01%
Maximum Input Level
Maximum Input Level Maximum Input Level Maximum Input Level.....................................................................................................+25dBu
Input Impedance
Input Impedance Input Impedance Input Impedance ........................................................................................... approx 20k ohms
Maximum Output Level
Maximum Output Level Maximum Output Level Maximum Output Level ............................................+32dBu balanced…+26dBu unbalanced
Output Impedance
Output Impedance Output Impedance Output Impedance...........................................................................................approx 70 ohms
In
In In Input Common Mode Rejection put Common Mode Rejection put Common Mode Rejection put Common Mode Rejection (ref 0dBu) ................. 100Hz -65dB…1kHz -65dB…10kHz -60dB
Noise
Noise Noise Noise all bands ON set flat........................................-110dB below max input level A weighted
General
General General General
Power requirements .......................................................... 115V/230V selectable on rear panel
Dimensions................................................................................... 4U rack mount, 300mm deep
0dBu = 0.775V RMS in these specifications. Specifications are typical of a production unit, and subject to change if
we improve something.